ML20031E187
| ML20031E187 | |
| Person / Time | |
|---|---|
| Site: | Fort Calhoun  |
| Issue date: | 10/06/1981 |
| From: | William Jones OMAHA PUBLIC POWER DISTRICT |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8110150210 | |
| Download: ML20031E187 (3) | |
Text
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Omaha Public Power District 1623 HARNEY a OMAHA. NEBRASMA 68102 e TELEPHONE S36 4000 AREA CODE 402 October 6, 1981 N
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Mr. Robert A. Clark, Chief f_
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S. Nuclear Regulatory Commission d v.seens u m 7
Office of Nuclear Reactor Regulation C
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Division of Licensing N.
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Operating Reactors Branch No. 3 Washington, D.C.
20555
Reference:
Docket No. 50-285
Dear Mr. Clark:
Several questions related to the Fort Calhoun Station fire pro-tection capabilities were asked during a telephone conversation on August 20, 1981 among Messrs. Trammell, Laung, Lobel, and Feranti from the Comission's staff, Mr. McDougal of Brookhaven National Labs, and Messrs. Patterson and Gambhir of Omaha Public Power District.
The District's response to these questions is attached.
Sincergly,
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{'%LLk W. C.
ones Divis on Manager Production Operations WCJ/KJM/TLP:jmm Attachment cc: LeBoeuf, Lamb, Leiby & MacRae 1333 New Hampshire Avenue, N.W.
Washington, D.C.
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8110150210 811006 hDRADOCK 05000285 l
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DISTRICT'S RESPONSE TO COMMISSION'S QUESTIONS ON FORT CALH0UN STATION FIRE PROTFCTION Question 1 Regarding the use of the diesel fire pump (DFP) to provide a backup source for auxiliary feedwater (AFW), the District states -that the DFP would be available within three hours, although the AFW storage tank provides a minimum eight hour supply. What is the basis for the three hou-s?
Response
The three hours was arbitrarily selected. The critical time is the eight hour Technical Specification limit on AFW storage tank capacity.
Question 2 How long does it physically take to cross-connect the OFP to the AFW system and to restore the system to normal?
Response
It would take approximately thirty minutes.
It should be noted that neither the fire prntection system or the AFW system need be taken out of service to perform this cross-connect. The system is cross-connected by connecting a fire hose between a valved fire hydrant and a 2-1/2" tee connection on the AFW storage tank fill line. The two systems are returned to normal by shutting the fire hydrant valve.
Additionally, even when the DFP is providing water to the AFW storage tank, the fire system is still available for fighting fires.
Question 3 Is steam generator pressure indication available on the alternate shutdown panels?
Response
Steam generator pressure indication will be provided on the safety grade AFW control panels to be completed during the refueling outage presently in progress.
Question 4 Is there AFW storage tank level indicction other than that in the control room?
Response
AFW storage tank level indication is available by local sight glass.
2-Question 5 In a letter dated March 27, 1981 regarding fire protection, the District. had committed to verifying the availability of manpower to perform the alternate shutdown evolution by May 1,1981. Has this been done?
Response
The District has reviewed the manpower needs to perform the alter-nate shutdown evolution and confirmed that the tasks to be performed immediately can be performed with existing on-shif t personnel and suf-t ficient manpower for augmentation is available for transition to long term shutdown /cooldown.
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